Content is the king - In the blogging world so diverse and big, you need to establish yourself with a distinction. the only road to it is good, original and valuable content. Be creative, different and surprise your readers once in a while.
Originality - Focus more on the originality of content and on a consistent basis. It is a habit you will need to cultivate.
Series of articles - Create a series of articles on your blog if the subject you choose to talk about is an extensive one.